JPS63158237A - Manufacture of bag - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a method for manufacturing a bag, and more particularly, to a bag manufacturing method, the present invention relates to a method for manufacturing a bag, and more particularly, to a packaging body made of a flat plastic film or sheet with one end open, lips are attached to both sides of the open end of the packaging body. The present invention relates to a method for producing a bag from a bag-like material integrally formed with the lips thereof being folded back to the outside and sealed to the outer surface of each side wall at the leading edge.

Prior art and its problems FIGS. 4 and 5 show an example of the bag (1) as described above.

This bag (1) is equipped with a rectangular main body (2) made by cutting a flat transparent plastic film tube into a predetermined length, and double side walls (2a) of the main body (2).
One end of the container is sealed with a seal portion (3) to form a bottom, and the other end is open. Lips (4) are integrally formed on both side walls (2a) of the open end of the main body (2). Both side edges of these lips (4) are approximately arcuate, and the width of the lips (4) becomes narrower toward the tip. Each lip (4) is folded back to the outside, and the sealed portion (5) of the tip edge seals each side wall (2a).
sealed on the outer surface of the

This bag (1) is attached to two horizontal support rods attached to, for example, a hospital bed, and is placed in a tunnel-like shape between the side walls (2a) and the lip (4) at the open end of the main body (2). It is supported by passing the part through it, and is used for purposes such as collecting urine. Note that the reason why the width of the lip (4) becomes narrower toward the tip is to facilitate insertion of a support rod or the like.

This type of bag has conventionally been manufactured, for example, as follows.

That is, first, a rectangular bag with one end open is manufactured from a flattened plastic film tube using a bag making machine. Next, a plurality of these bags are stacked and the edges on both sides of the opening end are cut out in a substantially arc shape to create a bag-like material with a lip (4) formed on the packaging body (2). Then, from this bag-like material, the lip (4) is manually folded back to the outside and sealed to the side wall (2a).

The process of completing the bag (1) from the bag-like material is the lip (4).
Since it involves the process of folding the material outward, it is difficult to automate, and as mentioned above, this is done manually, resulting in poor work efficiency and high costs.

An object of the present invention is to provide a method that can fully or semi-automatically complete the work of completing a bag from a bag-shaped material as described above.

Means for Solving the Problems The bag manufacturing method according to the present invention comprises: a supporting plate having a lip presser plate rotatably provided on both sides;
Insert the open lip presser plate into the bag-like material until it reaches the lip, close the lip presser plate, fold the lip outward, and press the lip presser plate on both sides of the lip except for the tip edge. , sealing the leading edge of the lip presser plate to the side walls from both sides, and opening the lip presser plate and extracting the support plate from the bag-like material.

Embodiment FIG. 1 shows an outline of the manufacturing process and manufacturing equipment for the above bag (1), and FIGS. 2 and 3 show a part of this manufacturing equipment. In the following description, the left side of FIGS. 1, 2, and 3 will be referred to as the front, and the right side will be referred to as the rear.

The manufacturing device includes a material supply device (10) that moves the bag-shaped material (6) forward one by one in a horizontal state with the lip (4) in front and stops it at a fixed position, and A pair of vacuum suction cups (11
), a pair of heat sealing devices (12) arranged facing each other so as to be able to move toward and away from each other up and down a little further back, and a horizontal heat sealing device (12) in front of the stopping position of the material (6). The support plate (13) is provided with a support plate (13) which is disposed in the front and back and is movable back and forth.

A rectangular lip presser plate (14) is attached to both the upper and lower sides of the central part of the support plate (13) in the front-rear direction via a hinge (15) so as to be rotatable back and forth.
) A thin plate (16) made of fluororesin (Teflon) with excellent heat resistance and releasability is pasted on both the top and bottom surfaces. Support plate (13
) The base ends of air rings (17) are rotatably attached to the upper and lower surfaces of the front end of each cylinder (1
The tip of the rod (17a) in item 7) is rotatably attached to a bracket (18) provided at a portion near the tip of the holding plate (14). Then, due to the expansion and contraction of the cylinder (17), the presser plate (14) is rotated forward as shown in FIGS. 1(a) to (C) and the open position shown in FIG. 1(d).
and a closed position rotated rearward as shown in FIG. Further, the support plate (13) can be moved between the front end position as shown in FIGS. 1(a) and (b) and the rear end position as shown in FIGS. 1(C) and (d) by appropriate means. I am made to do so.

The above manufacturing apparatus automatically manufactures the bag (1) from the bag-shaped material (6) in the following manner.

First, the material supply device (10) or the bag-shaped material (6) is sent forward and stopped at a fixed position (see FIG. 1(a)). At this time, the upper and lower suction cups (11) and the small sea device (12)
are far from each other. Further, the support plate (13) is stopped at the front end position, and the lip presser plate (14) is open.

Next, the upper and lower suction cups (11) move toward each other to suction the open end of the bag-shaped material (8) from both the upper and lower surfaces, and then move slightly away from each other to close the open end. (See figure (b)).

Next, the support plate (13) moves backward and enters the mounting body (2), and the upper and lower lip press plates (14) move the upper and lower lips (
After stopping at the rear end position inside the suction cup (1),
1) releases the bag-shaped material (6) and moves in the direction of moving away from the bag-shaped material (6) up and down (see figure (c)).

Next, by closing the upper and lower lip pressing plates (14), the lip (4) is folded outward and the portion excluding the tip edge is pressed from both sides by the pressing plates (14), and then the upper and lower sealing devices ( 12) move toward each other and sandwich the tip edge of the lip (4) and the side wall (2a) with the fluororesin thin plate (16) to seal them ((d) in the same figure).
)reference).

Next, after the sealing device (12) is vertically separated, the lip presser plate (14) is opened and the support plate (13) moves to the front end position and exits from the mounting body (2). Thereby, the bag is completed, and the completed bag (1) is discharged from the material supply device (10). And by repeating these actions,
Bags (1) are manufactured one after another. Therefore, work efficiency is high and costs can be reduced.

The above manufacturing equipment is usually installed independently from the bag making machine. In this case, the material supply device (10) uses, for example, a roller to feed the bag-like materials (6) stacked one above the other.
Send the bags forward one by one starting from the bottom, and make the completed bag (1).
is ejected forward.

However, the bag-making machine that produces the bag-like material (8) and the above-mentioned manufacturing equipment are installed in series or integrated, and the production of the bag-like material (6) and the future production of bags (1) are carried out. It is also possible to automatically perform a series of tasks all at once.

In this case, the material supply device (10) uses, for example, a conveyor to feed the bag-like material (6) manufactured by the bag-making machine and sent one by one forward as it is, and the completed bag (1 ) is ejected forward. In addition, the above support plate (13)
are fixed vertically with the cylinder (17) side facing down, heat sealing devices (12) are placed facing each other on both sides of the fluororesin thin plate (16), and the bag-shaped material (6
) can be placed on the support plate (13) from above and then the remaining operations can be performed automatically by operating a switch. Even if the work of completing the bag (1) from the bag-shaped material (6) is performed semi-automatically in this way, the work efficiency is improved compared to the conventional method.

When supplying the bag-shaped material (6) automatically, the material supply device (10) may be any device as long as it can stop the material (6) in a fixed position and discharge the completed bag (1). Not limited to things.・Also, support plate (13), lip presser plate (
14) and its opening/closing means are not limited to those of the above embodiments, but can be modified as appropriate.

Furthermore, the structure of the bag manufactured by the method of the present invention is not limited to that of the above embodiment.

Effects of the Invention According to the method of the present invention, as described above, the work of completing a bag from a bag-shaped material can be performed fully or semi-automatically. Therefore, work efficiency is improved and costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of a manufacturing apparatus showing one embodiment of the method of the present invention in the order of steps, and FIG.
3 is a sectional view taken along the line III-m of FIG. 1(d), FIG. 4 is a perspective view of the bag to which this invention is applied, and
The figure is a sectional view taken along the line ■-■ in FIG. 4. (1)...bag, (2)...packing body, (2a)...
Side wall, (4)... lip, (5)... seal part,
(6)... Bag-shaped material, (12)... Heat sealing device, (13)... Support plate, (14)... Lip presser plate. that's all

Claims (1)

[Scope of Claims] A bag-shaped material having lips integrally formed on both sides of the open end of a flat plastic film or sheet packaging body with an open end, each of which is folded back to the outside. A method of manufacturing a bag in which the outer surface of each side wall is sealed at the leading edge thereof, the support plate having a lip presser plate rotatably provided on both sides,
Insert the open lip presser plate into the bag-like material until it reaches the lip, close the lip presser plate, fold the lip outward, and press the lip presser plate on both sides of the lip except for the tip edge. A method of manufacturing a bag comprising pressing the lip presser plate from the bag, sealing the leading edge of the lip presser plate to the sidewalls from both sides, and opening the lip presser plate and extracting the support plate from the bag-like material.